This simulated river rock water feature has an electric pump (120v) that circulates water from bottom reservoir to top pool creating a gentle burbling creek sound as the water works it way back to the bottom. Measures 29" wide by 22" deep & 24" high. Probably made of fiberglass so lightweight and easily moved around. Ideal for decks and patios where you want to liven it up with a soothing water feature. In good working order.